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Asked Dec 5, 2019
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What mass of ethanol if 360 g if sucrose are dissolved in ethanol to make a 1.6 molal solution? If the density of ethanol is 0.89 g/mL, determine the volume of ethanol used. 

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First, using given molality and mass of sucro...

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Sucrose mass Solute moles Sucrose molar mass 360 g 342.3 g/mol = 1.052 moles Solute moles Molality kg of solvent 1.052 moles 1.6 = kg of ethanol 1.052 moles kg of ethanol= 1.6 = 0.6575 kg Mass of ethanol = 0.6575kg

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